Invariants
| Base field: | $\F_{97}$ |
| Dimension: | $2$ |
| L-polynomial: | $( 1 + 6 x + 97 x^{2} )( 1 + 12 x + 97 x^{2} )$ |
| $1 + 18 x + 266 x^{2} + 1746 x^{3} + 9409 x^{4}$ | |
| Frobenius angles: | $\pm0.598524067447$, $\pm0.708512424851$ |
| Angle rank: | $2$ (numerical) |
| Jacobians: | $216$ |
| Cyclic group of points: | no |
| Non-cyclic primes: | $2$ |
This isogeny class is not simple, primitive, ordinary, and not supersingular. It is principally polarizable and contains a Jacobian.
Newton polygon
This isogeny class is ordinary.
| $p$-rank: | $2$ |
| Slopes: | $[0, 0, 1, 1]$ |
Point counts
Point counts of the abelian variety
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ |
|---|---|---|---|---|---|
| $A(\F_{q^r})$ | $11440$ | $90513280$ | $829970181040$ | $7838334191001600$ | $73743791640013409200$ |
| $r$ | $1$ | $2$ | $3$ | $4$ | $5$ | $6$ | $7$ | $8$ | $9$ | $10$ |
|---|---|---|---|---|---|---|---|---|---|---|
| $C(\F_{q^r})$ | $116$ | $9618$ | $909380$ | $88539454$ | $8587500836$ | $832970203026$ | $80798287431572$ | $7837433644443646$ | $760231058602991060$ | $73742412688900800018$ |
Jacobians and polarizations
This isogeny class is principally polarizable and contains the Jacobians of 216 curves (of which all are hyperelliptic):
- $y^2=36 x^6+68 x^5+89 x^4+32 x^3+12 x^2+57 x+35$
- $y^2=50 x^6+24 x^5+7 x^4+10 x^3+73 x^2+57 x+90$
- $y^2=34 x^6+56 x^5+65 x^4+34 x^3+54 x^2+46 x+31$
- $y^2=67 x^6+28 x^5+21 x^4+66 x^3+21 x^2+28 x+67$
- $y^2=86 x^6+89 x^5+63 x^4+74 x^3+54 x^2+85 x+41$
- $y^2=89 x^6+26 x^5+77 x^4+46 x^3+88 x^2+3 x+51$
- $y^2=42 x^6+73 x^5+24 x^4+49 x^3+80 x^2+82 x+50$
- $y^2=20 x^6+42 x^5+92 x^4+23 x^3+12 x^2+87 x+50$
- $y^2=79 x^6+35 x^5+62 x^4+71 x^3+94 x^2+28 x+11$
- $y^2=64 x^6+45 x^5+71 x^4+65 x^3+82 x^2+63 x+29$
- $y^2=3 x^6+95 x^5+68 x^4+56 x^3+89 x^2+3 x+76$
- $y^2=22 x^6+43 x^5+79 x^4+11 x^3+76 x^2+27 x+44$
- $y^2=35 x^6+37 x^5+65 x^4+96 x^3+65 x^2+37 x+35$
- $y^2=78 x^6+16 x^5+33 x^4+91 x^3+86 x^2+96 x+12$
- $y^2=3 x^6+50 x^5+91 x^4+21 x^3+12 x^2+76 x+95$
- $y^2=54 x^6+77 x^5+5 x^4+8 x^3+17 x^2+21 x+73$
- $y^2=95 x^6+14 x^5+81 x^4+5 x^3+46 x^2+55 x+46$
- $y^2=6 x^6+64 x^5+32 x^4+66 x^3+21 x^2+29 x+47$
- $y^2=63 x^6+70 x^5+15 x^4+42 x^3+23 x^2+68 x+82$
- $y^2=75 x^6+79 x^5+28 x^4+92 x^3+35 x^2+20 x+47$
- and 196 more
Decomposition and endomorphism algebra
All geometric endomorphisms are defined over $\F_{97}$.
Endomorphism algebra over $\F_{97}$| The isogeny class factors as 1.97.g $\times$ 1.97.m and its endomorphism algebra is a direct product of the endomorphism algebras for each isotypic factor. The endomorphism algebra for each factor is: |
Base change
This is a primitive isogeny class.
Twists
Below is a list of all twists of this isogeny class.
| Twist | Extension degree | Common base change |
|---|---|---|
| 2.97.as_kg | $2$ | (not in LMFDB) |
| 2.97.ag_es | $2$ | (not in LMFDB) |
| 2.97.g_es | $2$ | (not in LMFDB) |